Something of a simple reference since I'll be referring to Steam in this post: https://www.crazyengineers.com/threads/steam-is-now-priced-in-inr-and-its-not-mere-usd-to-inr-conversion.85183/
Again as an example, I think The Witcher 3 costs about 25$ (might be lower, just an example) but through Steam I got it for about 400 Rupees (which converts to about ~8$).
What I'm saying is while direct money conversions might be good for global trade or whatever, for things such as recreation, currency conversions might have to be re-done to fit the local economy. People from certain countries might not be willing to shell out the same money as others since their earnings are considerably lower than what others earn (probably even doing the same job, in the same scale, in the same standard).
Maybe just put it somewhere on the back-burner. I'm not coming up with a concrete solution of how this could be done as I've no idea of how these conversions could happen or how you might be able to validate the user's country (good thing that there's already a donation approval system in place).
I understand that we do not have the same scale of business as Steam but the possibility of increasing the amount of money people spend on tRO by implementing such a system might be considerable.